Apple Macintosh Performa 577 User Manual Page 28

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  • TROUBLESHOOTING
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Troubleshooting Symptom Charts/Hard Drive - 11
Hard Drive
Internal or external
hard drive does not
operate
1 Verify that SCSI loopback card is not attached.
2 Verify that external drive is properly terminated.
3 Replace hard drive.
4 Replace logic board. Retain customer’s SIMMs.
5 Replace hard drive.
Works with internal
or external SCSI
device but does not
work with both
1 Verify that SCSI device ID switch setting on external device
is higher than 0. Also verify that ID switch setting on
external SCSI device does not duplicate ID switch settings on
any other attached external SCSI devices.
2 Replace terminator on external SCSI device.
3 Replace SCSI select cable.
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